<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>函数式组件使用props</title>
</head>
<body>
  <div id="test"></div>

  <script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
  <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
  <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
  <script src="https://cdn.staticfile.org/prop-types/15.6.1/prop-types.js"></script>

  <script type="text/babel">
    // 三大属性：state props refs 是组件实例的三大属性   
    // 而函数式组件，没有实例对象，就不存在三大属性，但是他有一个属性props，因为函数式组件可以通过传参的形式去接
    function Person(props) {
      const { name, sex, age } = props
      return (
        <ul>
          <li>姓名: { name }</li>  
          <li>性别: { sex }</li>  
          <li>年龄: { age }</li>  
        </ul>
      )
    }
    Person.propTypes = {
      name: PropTypes.string.isRequired,
      sex: PropTypes.string,
      age: PropTypes.number,
      speak: PropTypes.func
    }
    Person.defaultProps = {
      sex: 'boy',
      age: 19
    }
    ReactDOM.render(<Person name="tom"/>, document.getElementById('test'))
  </script>
</body>
</html>